alias symbol "eq" (instance 0) = "Coq's leibnitz's equality".
theorem a:\forall x.x=x.
alias id "nat" = "cic:/Coq/Init/Datatypes/nat.ind#xpointer(1/1)".
-exact nat.
-intro.
-reflexivity.
+[ exact nat.
+| intro. reflexivity.
+]
qed.
alias num (instance 0) = "natural number".
alias symbol "times" (instance 0) = "Coq's natural times".